Effect of star gears' eccentric errors on dynamic performances of a star gear transmission system with clearance floating

Using the lumped-parameter method, a generalized dynamic model for a star gear transmission system was established considering gear manufacturing eccentric errors and gear pair time-varying mesh stiffness and clearance floating mechanism. The system's dynamic differential equations were solved with the numerical method to get its forced vibration responses. The system's dynamic characteristics were analyzed with time histories, phase plane plots, Poincare maps and Fourier spectral analysis. The effects of star gears' eccentric errors and clearance floating mechanism on dynamic characteristics of the system were studied. The results showed that star gears eccentric errors enhance the system's vibration; different positions and different numbers of star gears eccentric errors cause different dynamic responses of the system; the clearance floating mechanism affects the stability of the system, it is harmful to vibration and noise control.